<  Physconia muscigena
Pilophorus acicularis  >
Click on Characteristic name for explanation. Click on image for larger version.
Physconia perisidiosa

Overview
PNW Range:
  West sideAbundant
  East sideCommon
  Immediate coastCommon
  Alpine or subalpineUncommon
Habitat: In a wide variety of habitats, including steppe, alpine tundra, riparian forests, agricultural valleys, and rock outcrop areas; low to high elevations; full sun to sheltered.
Substrate: Bark (usually hardwood trees and shrubs), mosses over rock, rock, or thin soil over rock.
Comments:
Synonymy: none
Physconia perisidiosa - Soralia
Soralia
by B. McCune
1/4
Physconia perisidiosa - Lobes
Lobes
by B. McCune
2/4
Physconia perisidiosa - Habit
Habit
by B. McCune
3/4
Physconia perisidiosa - Rhizines
Rhizines
by B. McCune
4/4
Scale: Bar=1mm unless noted
Growth Form
Fruticose: Never
Foliose: Almost always
Crustose: Never
Appressed Foliose: Almost always
Fluffy Foliose or Strappy: Never
Dangling Hair: Never
Erect Hair: Never
Appressed Hair: Never
Stalks With Squamules: Never
Stalks: Never
Squamules: Never
Single Holdfast: Never
Dangling Nets: Never
Lobe Width (mm): 1 (± 0.4)

Upper Surface
Upper Surface Color    (Dry) 
   Whitish: Almost always
   Pale Gray: Almost always
   Brown: Almost always
   Tan: Almost always
Upper Surface Tomentose: Never
Upper Surface Pruinose or Scabrid: Almost always
Upper Surface with Network of Ridges: Never
Upper Surface with Pseudocyphellae: Never
   Upper Surface with Holes into Cavity: Never
Cilia on Margins: Never
Lower Surface (Foliose)
Lower Surface Color    (Dry) 
   Black: Almost always
   Brown: Almost always
Veined Below: Never
Rhizinate Below: Almost always
   Rhizines Squarrose: Almost always
Tomentose Below: Never
Cyphellae: Never
Pseudocyphellae Below: Never
Papillae Below: Never

Interior
Inside (Medulla) Yellow or Orange: Never
Central Cord: Never
Hollow Stalks or Hollow Lobes: Never
Gelatinous: Never

Photobiont
Green Algae Primary Photobiont: Almost always
Cyanobacteria Primary Photobiont: Never
Internal Cephalodia: Never
External Cephalodia: Never

Sexual Reproduction
Perithecia: Never
Apothecia: Rarely
   Mazaedium: Never
Disk Color    (Dry) 
   Disk Black: Almost always

Asexual Reproduction
Isidia: Never
Soredia: Almost always
Lobules: Never